maybe this will do ? http://www.ebay.com/itm/GBS-8220-RGB-CGA-EGA-YUV-to-VGA-ARCADE-VIDEO-CONVERTER-BOARD-Latest-Software-/120967105011?ssPageName=ADME:B:FSEL:US:1123
On 5/23/2015 8:24 AM, Mark J. Blair wrote: > Assuming that I don't find an off-the-shelf converter that Just Works for our > poorly-behaving vintage computer video outputs, what I have in mind is this: > A converter that is specifically designed to emulate the response of an 80's > TV or 80's composite monitor when driven by a vintage computer output, and > translate that as well as practical to modern displays (particularly, 1080p > via HDMI). I have some ideas about how to accomplish this, but I will need to > do more work to see if I can create a solution that is not absurdly expensive. > > On the input side, I envision having two RCA jacks and an F connector, > accepting composite video, Y/C separated video (for C64, etc.), or TV RF > input. It should be able to accept NTSC or PAL, so the US and UK folks can > play. Is there a need for SECAM, or any other video standards? What about > other electrical interface options? I'm only hands-on familiar with US > machines. I understand that Atari computers were especially popular in > Poland, so I'd like to support those... anybody here know what format/channel > a Polish Atari 8-bit would output? > > In the middle will be some FPGA to perform any necessary magic. I've been > looking at a prohibitively expensive ($115) one that has enough dual-port RAM > blocks to support a frame buffer. I need to see if I can push the frame > buffer out into external RAM in order to move to a cheaper FPGA. It would be > ideal if the video parameters could be figure out automagically, but I have a > feeling there will be a need for user-adjusted parameters, and possibly even > loading up different FPGA programming to handle some odd-ball signal. > > Output would be HDMI, at 1080p. Are other interfaces and/or resolutions > desirable? I'd like to keep it as feature-simple as practical. > > Handling the VHF/UHF tuner economically may be another sticky point. Maxim > makes a tuner chip that's available at Digi-Key, but I refuse to design Maxim > parts into anything on account of off-topic reasons. Mouser has stock of a > very inexpensive ST tuner chip that looks very promising, but the full > datasheet isn't openly available. I need to contact ST to see if I can talk > them out of it. Their site mentions an NDA for the eval board, so it might be > tough, particularly since my intention would be for my design to be open to > allow off-label uses. > > Assuming I don't lose interest before completing this (a high-risk caveat, > naturally) and that I can find a way to make the price bearable, what do > y'all think about this silliness? I'm particularly interested in learning > about non-US TV formats so I can design in maximum utility. > -- The contents of this e-mail and any attachments are intended solely for the use of the named addressee(s) and may contain confidential and/or privileged information. Any unauthorized use, copying, disclosure, or distribution of the contents of this e-mail is strictly prohibited by the sender and may be unlawful. If you are not the intended recipient, please notify the sender immediately and delete this e-mail.
